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/*
* Copyright (c) 2009, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "core/rendering/svg/RenderSVGModelObject.h"
#include "SVGNames.h"
#include "core/rendering/svg/RenderSVGRoot.h"
#include "core/rendering/svg/SVGResourcesCache.h"
#include "core/svg/SVGGraphicsElement.h"
namespace WebCore {
RenderSVGModelObject::RenderSVGModelObject(SVGElement* node)
: RenderObject(node)
{
}
LayoutRect RenderSVGModelObject::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const
{
return SVGRenderSupport::clippedOverflowRectForRepaint(this, repaintContainer);
}
void RenderSVGModelObject::computeFloatRectForRepaint(const RenderLayerModelObject* repaintContainer, FloatRect& repaintRect, bool fixed) const
{
SVGRenderSupport::computeFloatRectForRepaint(this, repaintContainer, repaintRect, fixed);
}
void RenderSVGModelObject::mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState& transformState, MapCoordinatesFlags, bool* wasFixed) const
{
SVGRenderSupport::mapLocalToContainer(this, repaintContainer, transformState, wasFixed);
}
const RenderObject* RenderSVGModelObject::pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap& geometryMap) const
{
return SVGRenderSupport::pushMappingToContainer(this, ancestorToStopAt, geometryMap);
}
// Copied from RenderBox, this method likely requires further refactoring to work easily for both SVG and CSS Box Model content.
// FIXME: This may also need to move into SVGRenderSupport as the RenderBox version depends
// on borderBoundingBox() which SVG RenderBox subclases (like SVGRenderBlock) do not implement.
LayoutRect RenderSVGModelObject::outlineBoundsForRepaint(const RenderLayerModelObject* repaintContainer, const RenderGeometryMap*) const
{
LayoutRect box = enclosingLayoutRect(repaintRectInLocalCoordinates());
adjustRectForOutlineAndShadow(box);
FloatQuad containerRelativeQuad = localToContainerQuad(FloatRect(box), repaintContainer);
return containerRelativeQuad.enclosingBoundingBox();
}
void RenderSVGModelObject::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
{
IntRect rect = enclosingIntRect(strokeBoundingBox());
rect.moveBy(roundedIntPoint(accumulatedOffset));
rects.append(rect);
}
void RenderSVGModelObject::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const
{
quads.append(localToAbsoluteQuad(strokeBoundingBox(), 0 /* mode */, wasFixed));
}
void RenderSVGModelObject::willBeDestroyed()
{
SVGResourcesCache::clientDestroyed(this);
RenderObject::willBeDestroyed();
}
void RenderSVGModelObject::computeLayerHitTestRects(LayerHitTestRects& rects) const
{
// Using just the rect for the SVGRoot is good enough for now.
SVGRenderSupport::findTreeRootObject(this)->computeLayerHitTestRects(rects);
}
void RenderSVGModelObject::addLayerHitTestRects(LayerHitTestRects&, const RenderLayer* currentLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const
{
// We don't walk into SVG trees at all - just report their container.
}
void RenderSVGModelObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
if (diff == StyleDifferenceLayout) {
setNeedsBoundariesUpdate();
if (style()->hasTransform())
setNeedsTransformUpdate();
}
RenderObject::styleDidChange(diff, oldStyle);
SVGResourcesCache::clientStyleChanged(this, diff, style());
}
bool RenderSVGModelObject::nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint&, HitTestAction)
{
ASSERT_NOT_REACHED();
return false;
}
static void getElementCTM(SVGGraphicsElement* element, AffineTransform& transform)
{
ASSERT(element);
element->document().updateLayoutIgnorePendingStylesheets();
SVGElement* stopAtElement = element->nearestViewportElement();
ASSERT(stopAtElement);
AffineTransform localTransform;
Node* current = element;
while (current && current->isSVGElement()) {
SVGElement* currentElement = toSVGElement(current);
localTransform = currentElement->renderer()->localToParentTransform();
transform = localTransform.multiply(transform);
// For getCTM() computation, stop at the nearest viewport element
if (currentElement == stopAtElement)
break;
current = current->parentOrShadowHostNode();
}
}
// FloatRect::intersects does not consider horizontal or vertical lines (because of isEmpty()).
// So special-case handling of such lines.
static bool intersectsAllowingEmpty(const FloatRect& r, const FloatRect& other)
{
if (r.isEmpty() && other.isEmpty())
return false;
if (r.isEmpty() && !other.isEmpty()) {
return (other.contains(r.x(), r.y()) && !other.contains(r.maxX(), r.maxY()))
|| (!other.contains(r.x(), r.y()) && other.contains(r.maxX(), r.maxY()));
}
if (other.isEmpty() && !r.isEmpty())
return intersectsAllowingEmpty(other, r);
return r.intersects(other);
}
// One of the element types that can cause graphics to be drawn onto the target canvas. Specifically: circle, ellipse,
// image, line, path, polygon, polyline, rect, text and use.
static bool isGraphicsElement(RenderObject* renderer)
{
return renderer->isSVGShape() || renderer->isSVGText() || renderer->isSVGImage() || renderer->node()->hasTagName(SVGNames::useTag);
}
// The SVG addFocusRingRects() method adds rects in local coordinates so the default absoluteFocusRingQuads
// returns incorrect values for SVG objects. Overriding this method provides access to the absolute bounds.
void RenderSVGModelObject::absoluteFocusRingQuads(Vector<FloatQuad>& quads)
{
quads.append(localToAbsoluteQuad(FloatQuad(repaintRectInLocalCoordinates())));
}
bool RenderSVGModelObject::checkIntersection(RenderObject* renderer, const SVGRect& rect)
{
if (!renderer || renderer->style()->pointerEvents() == PE_NONE)
return false;
if (!isGraphicsElement(renderer))
return false;
AffineTransform ctm;
SVGGraphicsElement* svgElement = toSVGGraphicsElement(renderer->node());
getElementCTM(svgElement, ctm);
ASSERT(svgElement->renderer());
return intersectsAllowingEmpty(rect, ctm.mapRect(svgElement->renderer()->repaintRectInLocalCoordinates()));
}
bool RenderSVGModelObject::checkEnclosure(RenderObject* renderer, const SVGRect& rect)
{
if (!renderer || renderer->style()->pointerEvents() == PE_NONE)
return false;
if (!isGraphicsElement(renderer))
return false;
AffineTransform ctm;
SVGGraphicsElement* svgElement = toSVGGraphicsElement(renderer->node());
getElementCTM(svgElement, ctm);
ASSERT(svgElement->renderer());
return rect.contains(ctm.mapRect(svgElement->renderer()->repaintRectInLocalCoordinates()));
}
} // namespace WebCore
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